The eve of the next General Assembly session will arrive before authorities complete an investigation into Del. Don Dwyer, who admitted he was drunk while piloting a speed boat in a collision that seriously injured six people this past summer.

Authorities said Tuesday that witness interviews and toxicology screens are still incomplete as investigators probe the two-vessel crash that sent four children, Dwyer and another adult to the hospital after an Aug. 22 accident on the Magothy River.

Dwyer said in a news conference after the crash that his blood-alcohol level was 0.2 percent, more than twice the legal limit.

Sgt. Brian Albert of the Department of Natural Resources Police said investigators also have not determined which boat is at fault but that charges will be filed, possibly against the pilots of both boats.

Though Albert expanded the investigation's time frame by more than two months, he said that four months is not an abnormal duration for reconstructing boat accidents. He said the inquiry will not conclude until the beginning of 2013.

Each person in both vessels is represented by an attorney, which complicates the logistics of the investigation, Albert said.